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我们都知道,Internet上几乎所有的网页都是用HTML(HyperText Markup Language,超文本标记语言)编写的。这种语言是把信息根据需要连接起来的信息管理技术,它在当前的Internet世界中起到了主导作用。当用户向应用服务器发出请求时,应用服务器便向客户机发送相应的HTML文件,然后浏览器会加以解释执行并显示结果。HTML具有易学性和通用性、语法简单而精炼,但缺乏灵活性和动态更新效果。幸好,目前Microsoft和Netscape这两个主要的浏览器厂商都分别在其4.x版的浏览器中增加了对动态HTML(Dynamic HTML,DHTML)技术的支持。
We all know that almost all of the pages on the Internet are written in HyperText Markup Language (HTML). This language is information management technology that connects information as needed and plays a leading role in the current Internet world. When the user makes a request to the application server, the application server sends the client an HTML file, which the browser interprets and displays the result. HTML is easy to learn and versatile, simple and elegant in syntax, but lacks flexibility and dynamic update. Fortunately, Microsoft and Netscape, the two major browser vendors, have added Dynamic HTML (DHTML) support to their 4.x browsers, respectively.